draw rectangles

inc/lzy.h

@@ -14,6 +14,8 @@ int LZY_DrawEnd(void);
 void LZY_DrawSetColor(uint8_t r, uint8_t g, uint8_t b);
 void LZY_DrawSetColorNone(void);
 int LZY_DrawClear(void);
+int LZY_DrawRect(int x, int y, unsigned int w, unsigned int h);
+int LZY_DrawFillRect(int x, int y, unsigned int w, unsigned int h);
 void LZY_CycleEvents(void);
 int LZY_KeyDown(unsigned int key);
 int LZY_ShouldQuit(void);
@@ -49,7 +51,7 @@ enum LZY_ScanCode {
 #define LZY_TILE_SIZE 16
 #endif
 #ifndef LZY_DISPLAY_WIDTH
-#define LZY_DISPLAY_WIDTH 400
+#define LZY_DISPLAY_WIDTH 396
 #endif
 #ifndef LZY_DISPLAY_HEIGHT
 #define LZY_DISPLAY_HEIGHT 224
@@ -116,6 +118,20 @@ int LZY_DrawClear(void) {
 	return 0;
 }
 
+int LZY_DrawRect(int x, int y, unsigned int w, unsigned int h) {
+	if (w < 1 || h < 1)
+		return -1;
+	drect_border(x, y, x + w - 1, y + h - 1, C_NONE, 1, draw_color);
+	return 0;
+}
+
+int LZY_DrawFillRect(int x, int y, unsigned int w, unsigned int h) {
+	if (w < 1 || h < 1)
+		return -1;
+	drect(x, y, x + w - 1, y + h - 1, draw_color);
+	return 0;
+}
+
 void LZY_CycleEvents(void) {
 	clearevents();
 	should_quit = should_quit || keydown(KEY_EXIT);
@@ -153,7 +169,7 @@ static uint64_t next_time;
 int LZY_Init(const char *title, int target_fps) {
 	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
 		error = SDL_GetError();
-		return 1;
+		return -1;
 	}
 
 	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, 0);
@@ -163,7 +179,7 @@ int LZY_Init(const char *title, int target_fps) {
 	                          LZY_DISPLAY_HEIGHT, SDL_WINDOW_SHOWN);
 	if (window == NULL) {
 		error = SDL_GetError();
-		return 2;
+		return -2;
 	}
 
 	SDL_SetWindowMinimumSize(window, LZY_DISPLAY_WIDTH, LZY_DISPLAY_HEIGHT);
@@ -171,7 +187,7 @@ int LZY_Init(const char *title, int target_fps) {
 	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
 	if (renderer == NULL) {
 		error = SDL_GetError();
-		return 3;
+		return -3;
 	}
 
 	fps_limiter = target_fps > 0;
@@ -227,7 +243,25 @@ void LZY_DrawSetColorNone(void) {
 int LZY_DrawClear(void) {
 	if (SDL_RenderClear(renderer) < 0) {
 		error = SDL_GetError();
-		return 1;
+		return -1;
+	}
+	return 0;
+}
+
+int LZY_DrawRect(int x, int y, unsigned int w, unsigned int h) {
+	const SDL_Rect rect = {x, y, w, h};
+	if (SDL_RenderDrawRect(renderer, &rect) < 0) {
+		error = SDL_GetError();
+		return -1;
+	}
+	return 0;
+}
+
+int LZY_DrawFillRect(int x, int y, unsigned int w, unsigned int h) {
+	const SDL_Rect rect = {x, y, w, h};
+	if (SDL_RenderFillRect(renderer, &rect) < 0) {
+		error = SDL_GetError();
+		return -1;
 	}
 	return 0;
 }

src/main.c

@@ -2,8 +2,11 @@
 #include "lzy.h"
 #include <stdint.h>
 
+static void draw_player(int x, int y);
+
 int main(void) {
-	uint8_t c = 0;
+	int x = 0;
+	int y = 0;
 
 	if (LZY_Init("lzy example", 30)) {
 		LZY_Log(LZY_GetError());
@@ -13,15 +16,24 @@ int main(void) {
 	LZY_Log("init was great success!");
 
 	do {
+		/* update */
 		LZY_CycleEvents();
 		if (LZY_KeyDown(LZYK_LEFT))
-			c -= 8;
+			x--;
 		if (LZY_KeyDown(LZYK_RIGHT))
-			c += 8;
+			x++;
+		if (LZY_KeyDown(LZYK_UP))
+			y--;
+		if (LZY_KeyDown(LZYK_DOWN))
+			y++;
 
+		/* draw */
 		LZY_DrawBegin();
-		LZY_DrawSetColor(c, c, c);
-		LZY_DrawClear();
+		{
+			LZY_DrawSetColor(0x20, 0x20, 0x00);
+			LZY_DrawClear();
+			draw_player(x, y);
+		}
 		LZY_DrawEnd();
 	} while (!LZY_ShouldQuit());
 
@@ -29,3 +41,10 @@ int main(void) {
 	LZY_Quit();
 	return 0;
 }
+
+static void draw_player(int x, int y) {
+	LZY_DrawSetColor(0x00, 0xff, 0xff);
+	LZY_DrawFillRect(x, y, 8, 8);
+	LZY_DrawSetColor(0xff, 0x00, 0x00);
+	LZY_DrawRect(x + 1, y + 1, 6, 6);
+}